Authorities linked him to the case through DNA testing and are charging him as an adult.

Harry Ainsworth was a longtime volunteer with the New Orleans Police Department's COPS 8 program, which provides assistance to the officers of the 8th District.

"The members of the 8th District station sincerely appreciated his efforts to fix up the station by painting and repairing various things in the building," police Supt. Ronal Serpas said last month. "He'll be missed."